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<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title>addclass,removeclass,hasclass,toggleclass,getbyclass</title> </head> <body> <div 阅读全文
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<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title>JS判断上传图片格式是否正确</title> </head> <body> <input type="file" id="file"/> <input id=" 阅读全文
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<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title>文字超出限制字数后隐藏</title> <style> .text { width: 800px; height: 48px; line-height: 24p 阅读全文
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<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title>JS判断输入框的值是否为空</title> </head> <body> <input type="text" id="txt"/> <input type=" 阅读全文
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来一个老生常谈的话题--九九乘法表,哈哈,好久不写了呢 <!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> th{ border: #ccc 1px solid; font-we 阅读全文